@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');
:root{--bg:#f8fafc;--fg:#111827;--card:#fff;--accent:#0f766e}
@media(prefers-color-scheme:dark){:root{--bg:#0f172a;--fg:#f8fafc;--card:#1e293b}}
*{box-sizing:border-box}body{margin:0;font-family:Inter,sans-serif;background:var(--bg);color:var(--fg)}
.top{display:flex;justify-content:space-between;align-items:center;padding:20px 8%;position:sticky;top:0;background:var(--bg)}
.logo span{color:var(--accent)}nav a{margin-left:20px;color:inherit;text-decoration:none}
.hero{text-align:center;padding:90px 20px}
.hero h1{font-size:3.5rem;margin:.2em 0}.hero h2{font-size:2rem}
.buttons{margin-top:30px}.btn{background:var(--accent);color:#fff;padding:14px 24px;border-radius:8px;text-decoration:none;margin:8px;display:inline-block}.secondary{background:#555}
section{padding:70px 8%}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.card{background:var(--card);padding:24px;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.08)}
footer{text-align:center;padding:40px;border-top:1px solid #ccc}